read-eval-print-loop

I have some lines of python code that I'm continuously copying/pasting into the python console. Is there a load command or something I can run? e.g. load file.py John Machin For Python 2 (see other answers for Python 3) give this a try: execfile('file.py') Example usage: C:\junk>copy con execfile_example.py a = [9, 42, 888] b = len(a) ^Z 1 file(s) copied. C:\junk>\python27\python Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> execfile('execfile_example.py') >>> a [9, 42, 888] >>> b

It was my understanding that python will print the repr of the output, but this is apparently not always the case. For example: In ipython: In [1]: type([]) Out[1]: list In [2]: set([3,1,2]) Out[2]: {1, 2, 3} In python: >>> type([]) <type 'list'> >>> set([3,1,2]) set([1, 2, 3]) What transformation does ipython apply on the output? Instead of repr or standard pprint module IPython uses IPython.lib.pretty.RepresentationPrinter.pretty method to print the output . Module IPython.lib.pretty provides two functions that use RepresentationPrinter.pretty behind the scenes. IPython.lib.pretty.pretty

I want to use rlwrap with a custom erlang repl. It works perfectly if I run it as "rlwrap -a myrepl". The problem is that myrepl has builtin tab completion which gets trampled by rlwrap. I want to make rlwrap to release the TAB key You can't use rlwrap 's line editing/history and your repl's TAB completion at the same time. rlwrap provides line editing, history and (very simple) completion for commands that don't have it . A command that has something as fancy as TAB completion shouldn't need rlwrap to do its line editing, should it? The -a ( --always-readline ) option is a rather crude way to

If the result of some javascript calculation is an array of 10,000 elements, the Node.js repl prints this out. How do I prevent it from doing so? Thanks Why don't you just append ; null; to your expression? As in new Array(10000); null; which prints null or even shorter, use ;0; Assign the result to a variable declared with var . var statements always return undefined . > new Array(10) [ , , , , , , , , , ] > var a = new Array(10) undefined Node uses inspect to format the return values. Replace inspect with a function that just returns an empty string and it won't display anything. require(

If I try to evaluate the following code in my emacs cider-repl, nil is returned, as expected, but none of the printing takes place in the repl buffer or console. How can I make this print out as intended? (dotimes [i 5] (.start (Thread. (fn [] (Thread/sleep (rand 500)) (println (format "Finished %d on %s" i (Thread/currentThread))))))) ;=> nil This works fine, however: (println (format "Finished 1 on %s" (Thread/currentThread))) ;=> Finished 1 on Thread[nREPL-worker-18,5,main] ----------- mini-buffer ----------------- nil The behavior of println is to use a dynamically bound var called *out*

I created this function in Python 2.7 with ipython : def _(v): return v later if I call _(somevalue) , I get _ = somevalue . in[3]: _(3) out[3]: 3 in[4]: print _ out[4]: 3 The function has disappeared! If I call _(4) I get: TypeError: 'int' object is not callable` Why? What's wrong with this function? The Python interpreter assigns the last expression value to _ . This behaviour is limited to the REPL interpreter only, and is intended to assist in interactive coding sessions: >>> import math >>> math.pow(3.0, 5) 243.0 >>> result = _ >>> result 243.0 The standard Python interpreter goes to some